Self-filling fountain-pen.



jma

A. MUBHLMATT.

SELF FILLING FOUNTAIN PEN. APPLIOATION FILED Amm, 1912.

Patented June 17, 1.913.`

length, hinged -at one end to the plate.

AELPH MUEHLMATT, OF/ NEWPORT, KENTUCKY.

SELF-FILLING FOUNTAIN-PEN.

Application filed April 5, 1912.

Specification of Letters Patent.

Patented in ne 1 7 i913.

Serial No. 688,668.

Be it known that l, Anonru )'liiinnnvr'r, a citizenof thefl-.lnitedStates, and a resident of the city'of Newport, in the county of Campbelland State of Kentucky, have invented certain new and useful improvementsin Self-Filling .l"ountaiu-l)ens. otl which the following is a full`clear, and exact description, reference being had to the accompanyingdrawings, forming a part of Vthis specitication. My invention relates tofountain pens which till through the ink feeding` channel and especiallyto such pensas employ a rubber sac for an ink reservoir and till bydeflating the rubbei` sac.

Ordinarily the employment. of this means of filling peus has beenaccompanied by the use of complicated devices for detlating the sac,which require several movements in their operation, and are an annoyanceto the user, as well as troublesome to the manufacturer.

To simplify and render more ellicient. the deflating device is thespecial object of my invention, and this I accomplish by that certainnovel construction and arraiigen'ient of parts to be hereinafter pointedout and specified, whereby I detiate the rubber sac by means of a longand narrow plate actuated by'turning a screw in the end of the barrel ofthe pen',

In the drawings, Figure 1 is a vertical section of the pen with therubber reservoir in normal position. Fig. 2 is a similar section, Withthe reservoir detlated. Fig. 3 is a perspective view of one end of theinner tube. Fig, 4 is the operating screw and disk. Figs. 5 and G areviews partly in sei-tion of modifications of that part shown in Fig. 4.

l is the barrel of the pen made of suitable material, such vulcanizedrubber, into which is screwthreaded at one end a tapered portion 2,containing` the ink-feeding tube 3, and into which is inserted the penpoint 4. The portion 2 is extended at the base toform an end 5 on whichis slipped the long rubber sac 6.

Of a size to tit closely within the barrel l, is the tube 7, Fig. 3,with annular grooves 8, 8 about its circumference, and transverse thesegroovesfthe slots 9. A long narrow plate 10 is provided, with links 11,of equal The other end of each link is placed through the slots 9 andbent v over at 12 to engage ringsl 13 which are inserted in the groovesH and drawn through vthe bent ends 12. The one eudof the tube 7 isgrooved at 14, 14, so that ridges are formed on its inner surface teengage notches 15. 15, in ay disk 16. 'lhis disk lo is adapted to titinto the grooved end of that-tube 7, and when forcgd into the tube, topress on the plate 10.

The rear end ot' the barrel is threaded to receive the end portion shownin Fig. l, which is formed with the cap 17, the screw 18 and the sleeve1f). The inner side of this sleeve is threaded at a pitch preferablyfour times greater than the end of the barrel but in the same direction,and into it is fitted the screw 20, the head of which screw is the plate16 above referred to.

The assembling of the parts and the operation of the pen are as follows;The tube 7 Jwith the plate 10 attached to it as described is fixedrigidly within the barrel and the sac (i insertedin the barrel, raisingtheplate so that it rests on the sac. The disk 16 with its screw 2O isl.inserted in the tube 7 and the end piece screwed into place in thebarrel. Inasmuch as the ridges in the tube prevent the disk fromrotating, when the operator unscrews the head 17 of the end piece andthus rotates the. sleeve 19, the screw /20 turns within the sleeve andis forced out of the sleeve a distance four times as great as the head17 is moved. The disk is by this" means pushed into the tube and forcesdown the plate 10. This detiates the ink sac,'and when the head isturned back into place, the sacy will suck up ink through the feedingtube.

The modication shown in Fig. 5 consists in the elimination of the fourto one screw, and the attachmentof the disk 16 to a pin 21 which isadapted to slide back and forth in an opening 22 in the head 23 whichscrews into the end of the pen barrel. `When it is desired to operatethe del'iating plate, the user may push in the pin, thereby bringing thedisk 16 into contact with the plate and forcing thc plate down onto therubber sac. The actionof the sac in filling itself with ink raises theplate and forces the disk and piu back into normal position ready foranother' operation.'

1n the modification shown in Fig. t3, the. head 25 is cored out as shownby the dotted 'lines at 26, and a plunger 29 is inserted, adapted tomove back and forth in this cored out port-ion. ,A slot- 24 is cut inthe side of the head 25l and the plunger 29 is provided4 with a pin 27which projects throughk the slot. The end ot the detlatiiig plate l0 isextended at QS and attached to the plunger 29 by aloose connection 30,-lilie a iiiortise and tenon joint. In operating the deliating plate inthis construction, the user 'presseS forward the pin 27, therebypressing doivn the detlating plate. He then pushes it back again,allowing the rubber sac to till iiselt'.

-Besides providing a simple ineeliaiiieiil ineans for actuatingiiiy'detlzitiiig plate, l also provide in ii'iy plate iin efficientinc-uns for detlating the sac. The plate, being hung on a plurality ot'hinges ot equal length, swings iii a plane Constantly parallel to theaxis otY` the ink suc, thereby pressing out' the sac smoothly andcompletely.

Having thus described niy invention, what. l oiiiini as new and desireto secure by Leliters liilent, is:

l. In a selt-filling'fountain pen, a liexible sae ink reservoir, -ahinged plate for deflat- 2. In a self-lilling fountain pen, a flexiblesae ink reservoir, an inner tube yin tlie pen barrel i'iusli with theinner surface thereof,

a plate foi dellatirig the sac, annular grooves in the inner tube, withtransverse slots tlieiein, a plurality ot links between the plate andthe tube, with the ends ot the links projecting' iiito said slots, :indrings in. the grooves loting-fige the links and provide a hinge coin.

Corfies of this patent may be obtained for lfive cents each, byaddressing the Commissioner of Patents'.

Washington, D. C. i

